Regulation of gene expression overview

Question 1

regulation at the level of transcription

Answer 1

most regulation of gene expression occurs at transcription. refers to whether mRNA is synthesized or not

Question 2

eg of regulation at the level of transciption (3)

Answer 2

quorum sensing autoinducers that stimulate transcription indirectly.different sigma factors (the expression of sigma factors is controlled by regulatory proteins). transcription regulators which either enhance or repress transcription

Question 3

regulation at the level of translation

Answer 3

proteins or antisense RNA can bind to the 5’ end of the mRNA and prevent ribosome from binding

Question 4

regulation of protein actvity

Answer 4

a) protein can be phosphorylated eg CheA and CheY

b) protein can be methylated eg MCP